An abandoned British island reclaimed by nature

From compost-powered cities to dark-sky pioneers, these lesser-known US towns are proving that sustainability and great travel go hand in hand.

Treetop living is not just for kids. These architect-designed, "nest-like" dwellings – created in forests all over the world – are the ultimate sky-high retreats from urban living.

Abigail and Marcus Beck live in a eco home which relies on renewable energy, which means no gas power in the winter months